According to Emmett's answer, an Edit action on a post immediately dequeues it from the close votes queue. But why? That doesn't seem very productive. Just because someone edits a question doesn't necessarily mean it's no longer close-worthy. It seems more prone to abuse, as a user can just make a minor edit to dequeue it. If no one notices and casts another close vote, the existing close votes silently fade away and the question remains open because it never got fully reviewed.
A specific example (not claiming he's abusing the system) is this question, where a simple addition of a space kicked the question out of the the review queue, even though it only had one previous Leave Open vote. That edit certainly doesn't improve the question to a point where it should no longer be reviewable. (Note: Not nitpicking this question, it's just the most recent example of this.)
In the end, should a single user be able to dequeue a post like that when it normally takes three (previously five) Leave Open votes to dequeue it? This makes little sense to me. If an edit really improved a question enough that it should no longer be closed, then count their Edit as a Leave Open and let the community continue reviewing it and cast their own Leave Open votes, if they agree. The system shouldn't just assume and toss the question aside.